GHS Classification Result
GENERAL INFORMATION
REFERENCE INFORMATION
PHYSICAL HAZARDS
HEALTH HAZARDS
ENVIRONMENTAL HAZARDS
NOTE:
GENERAL INFORMATION
| Item | Information |
|---|---|
| CAS RN | 7631-95-0 |
| Chemical Name | Sodium molybdate |
| Substance ID | H27-A-050/C-127A_P |
| Classification year (FY) | FY2015 |
| Ministry who conducted the classification | Ministry of Health, Labour and Welfare (MHLW)/Ministry of the Environment (MOE) |
| New/Revised | New |
| Classification result in other fiscal year | |
| Download of Excel format | Excel file |
REFERENCE INFORMATION
| Item | Information |
|---|---|
| Guidance used for the classification (External link) | GHS Classification Guidance for the Japanese Government (FY2013 revised edition (Ver. 1.1)) |
| UN GHS document (External link) | UN GHS document |
| Definitions/Abbreviations (Excel file) | Definitions/Abbreviations |
| Model Label by MHLW (External link) | MHLW Website (in Japanese Only) |
| Model SDS by MHLW (External link) | MHLW Website (in Japanese Only) |
| OECD/eChemPortal (External link) | eChemPortal |
| Hazard class | Classification | Pictogram Signal word |
Hazard statement (code) |
Precautionary statement (code) |
Rationale for the classification | |
|---|---|---|---|---|---|---|
| 1 | Explosives | Not applicable |
- |
- | - | There are no chemical groups present in the molecule associated with explosive properties. |
| 2 | Flammable gases (including chemically unstable gases) | Not applicable |
- |
- | - | "Solids" according to GHS definition. |
| 3 | Aerosols | Not applicable |
- |
- | - | Not an aerosol product. |
| 4 | Oxidizing gases | Not applicable |
- |
- | - | "Solids" according to GHS definition. |
| 5 | Gases under pressure | Not applicable |
- |
- | - | "Solids" according to GHS definition. |
| 6 | Flammable liquids | Not applicable |
- |
- | - | "Solids" according to GHS definition. |
| 7 | Flammable solids | Not classified |
- |
- | - | It is non-flammable (GESTIS (Access on September 2015)). |
| 8 | Self-reactive substances and mixtures | Not applicable |
- |
- | - | There are no chemical groups present in the molecule associated with explosive or self-reactive properties. |
| 9 | Pyrophoric liquids | Not applicable |
- |
- | - | "Solids" according to GHS definition. |
| 10 | Pyrophoric solids | Not classified |
- |
- | - | It is non-flammable (GESTIS (Access on September 2015)). |
| 11 | Self-heating substances and mixtures | Not classified |
- |
- | - | It is non-flammable (GESTIS (Access on September 2015)). |
| 12 | Substances and mixtures which, in contact with water, emit flammable gases | Not classified |
- |
- | - | It is estimated that it does not react vigorously with water from water solubility data measured. water solubility: 650 g/L (20 degrees C) (GESTIS (Access on September 2015)) |
| 13 | Oxidizing liquids | Not applicable |
- |
- | - | "Solids" according to GHS definition. |
| 14 | Oxidizing solids | Classification not possible |
- |
- | - | It is an inorganic compound that contains oxygen, but the classification is not possible due to no data. |
| 15 | Organic peroxides | Not applicable |
- |
- | - | It is an inorganic compound. |
| 16 | Corrosive to metals | Classification not possible |
- |
- | - | No established test method suitable for solid substances. |
| Hazard class | Classification | Pictogram Signal word |
Hazard statement (code) |
Precautionary statement (code) |
Rationale for the classification | |
|---|---|---|---|---|---|---|
| 1 | Acute toxicity (Oral) | Category 3 |
 Danger |
H301 | P301+P310 P264 P270 P321 P330 P405 P501 |
From a reported LD50 value of 250 mg/kg for rats (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan (2012)), it was classified in Category 3. |
| 1 | Acute toxicity (Dermal) | Classification not possible |
- |
- | - | Due to lack of data, the classification is not possible. |
| 1 | Acute toxicity (Inhalation: Gases) | Not applicable |
- |
- | - | "Solids" according to GHS definition. |
| 1 | Acute toxicity (Inhalation: Vapours) | Not applicable |
- |
- | - | "Solids" according to GHS definition. |
| 1 | Acute toxicity (Inhalation: Dusts and mists) | Classification not possible |
- |
- | - | The classification is not possible due to lack of data. Besides, the category cannot be determined only from a reported LC50 (4 hours) of > 2,08 mg/L for rats (GESTIS (Access on September 2015)). A reference value of dust/mists was used because a test substance is a solid. |
| 2 | Skin corrosion/irritation | Category 2 |
 Warning |
H315 | P302+P352 P332+P313 P362+P364 P264 P280 P321 |
It is written that this substance shows severe irritation to the skin (HSDB (Access on September 2015)) and that primary irritation was shown 24 hours after application but resolved within 72 hours (PATTY (6th, 2012)). From the information of severe irritation, it was classified in Category 2. |
| 3 | Serious eye damage/eye irritation | Category 2 |
Warning |
H319 | P305+P351+P338 P337+P313 P264 P280 |
It is written that this substance shows irritation to eyes (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan (2012); HSDB (Access on September 2015)) and that conjunctival redness were observed after an application of a 20% solution of this substance (PATTY (6th, 2012)). From the above, it was classified in Category 2. |
| 4 | Respiratory sensitization | Classification not possible |
- |
- | - | Due to lack of data, the classification is not possible. |
| 4 | Skin sensitization | Classification not possible |
- |
- | - | The classification is not possible due to lack of data. Besides, it is written that this substance does not show sensitization (PATTY (6th, 2012)). |
| 5 | Germ cell mutagenicity | Category 2 |
 Warning |
H341 | P308+P313 P201 P202 P280 P405 P501 |
As for in vivo, a mouse dominant lethal test and a micronucleus test in mouse bone marrow cells were positive (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan (2012); ACGIH (7th, 2003)). As for in vitro, a micronucleus test in human lymphocytes was positive (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan (2012); ACGIH (7th, 2003)). Because the positive result the mouse dominant lethal test is unclear, based on the positive result of the micronucleus test in mouse bone marrow, the substance was classified in Category 2 in accordance with the Guidance. |
| 6 | Carcinogenicity | Category 2 |
Warning |
H351 | P308+P313 P201 P202 P280 P405 P501 |
There is no carcinogenicity information on this substance itself, but it is thought that the information on soluble molybdenum compounds is usable as shown below. As for humans, in a case-control study on workers who handled molybdenum compounds over 21 years, as a result of an investigation of correlation between exposure to molybdenum and a lung cancer incidence, for chromium and mineral oils to which they were exposed simultaneously, there is no correlation between an exposure period and a lung cancer incidence, and only exposure to molybdenum shows a dose-response relationship, and an increased risk of lung cancer by molybdenum exposure was reported for the first time (ACGIH (7th, 2003)). As for experimental animals, in a carcinogenicity test in which rats or mice were exposed by inhalation to molybdenum trioxide that is a soluble molybdenum compound for 2 years, an increased trend of incidences of alveolar/bronchiolar adenoma and cancer (combined) in male rats, an increased incidence of alveolar/bronchiolar cancer, and alveolar/bronchiolar adenoma and cancer (combined) in male mice, and increased incidences of alveolar/bronchiolar adenoma, and alveolar/bronchiolar adenoma and cancer (combined) in female mice were observed. Therefore, concerning weighing of evidence for carcinogenicity, it is concluded in NTP that there is equivocal evidence in male rats and some evidence in male and female mice (NTP TR 462 (1997)). As a carcinogenicity classification result by other organization, ACGIH classified soluble molybdenum compounds in "A3" because further investigation is needed to verify only one human epidemiological study reporting an increased risk of lung cancer although soluble molybdenum compounds surely show carcinogenicity in experimental animals (ACGIH (7th, 2003)). Besides this, there is no classification result by the international organization. As above, because this substance corresponds to a soluble molybdenum compound, it is thought that Category 2 is adequate in this hazard class. |
| 7 | Reproductive toxicity | Category 2 |
Warning |
H361 | P308+P313 P201 P202 P280 P405 P501 |
There is no information on reproductive effects in humans. As for experimental animals, it is written that female rats were given dihydrate of this substance in drinking water for six weeks, and a part of animals was slaughtered at that time, and the rest was mated with untreated males and kept dosing until day 21 of gestation in a test. A prolongation of sex cycle was observed in groups of 10 ppm (converted to this substance equivalent: 3.4 mg/kg/day) or higher at the end of 6-week exposure, and maternal animals showed weight gain reduction, lower fetal weight, lower trend in fetus number, increased resorptions, and delayed organ development in fetuses at 10 ppm or above in a group dosed during a gestation period (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan (2012)). It is written that after 13-week diet administration with dihydrate of this substance, male and female rats were mated, a decreased fertility index was observed at doses of 80 ppm (about 8 mg/kg/day) or higher. Males of sterile pairs were mated with untreated females, but pregnant females were not obtained, and atrophy of seminiferous tubule was observed histologically in testis (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan (2012)). Besides these, it is also written that in a test in which mice were given a soluble molybdenum compound (a name of the substance is unknown) in drinking water for a period of over six months throughout three generations, increased early deaths in the offspring of F1 and F3 generations, increased mortality of F3 maternal animals, and growth inhibition in F3 offspring were shown in a dosed group (10 ppm) (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan (2012); DFGOT vol. 18 (2002)). As above, for soluble molybdenum compounds including this substance, from the test results using experimental animals, reproductive/developmental toxicity was observed at the doses where general toxicity effects of molybdenum were mostly found in parent animals. Therefore, the substance was classified in Category 2 for this hazard class. |
| 8 | Specific target organ toxicity - Single exposure | Category 3 (Respiratory tract irritation) |
Warning |
H335 | P304+P340 P403+P233 P261 P271 P312 P405 P501 |
Aerosol of this substance is irritating to the respiratory tract, and cough and pharyngalgia in inhalation, and abdominal pain, nausea, vomiting, and diarrhea in oral digestion were reported (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan (2012)). From the above, it was classified in Category 3 (respiratory tract irritation). |
| 9 | Specific target organ toxicity - Repeated exposure | Category 1 (systemic toxicity, testis), Category 2 (kidney) |
Danger Warning |
H372 H373 |
P260 P264 P270 P314 P501 |
No human data. As for experimental animals, in a test in rats in 4-week diet administration of disodium molybdate dihydrate (CAS number: 10102-40-6), besides deaths, extreme emaciation and decreased body weight caused by increased excretion of copper from bodies due to molybdenum administration were observed, and results of necropsy and blood test were within a normal range. At 0.05% (about 25 mg/kg/day) (converted to a 90-day equivalent: 7.78 mg/kg/day) of the lowest dose of this test, decreased body weight was found. (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan (2012)) In a test in rats in 13-week diet administration of disodium molybdate dehydrate, degeneration of seminiferous tubule in testis were observed in males at 0.008% (8 mg/kg/day) within a range of Category 1 (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan (2012)). Moreover, in a test in rats in 90-day gavage administration of disodium molybdate dehydrate, weight gain reduction and slight diffuse hyperplasia of proximal tubule were found at 60 mg/kg/day within a range of Category 2 and reversibility was observed (SIDS/SIAP (2013)). As above, deaths, extreme emaciation, and decreased body weight for which target organs could not be specified were regarded as systemic effects and observed within a range of Category 1. Moreover, effects on testis were found within a range of Category 1, and effects on kidney were observed within a range of Category 2. Therefore, the substance was classified in Category 1 (systemic toxicity, testis), Category 2 (kidney). |
| 10 | Aspiration hazard | Classification not possible |
- |
- | - | Due to lack of data, the classification is not possible. |
| Hazard class | Classification | Pictogram Signal word |
Hazard statement (code) |
Precautionary statement (code) |
Rationale for the classification | |
|---|---|---|---|---|---|---|
| 11 | Hazardous to the aquatic environment (Acute) | Not classified |
- |
- | - | From 96-hour LC50 = 2650 mg Mo/L for for crustacea (Crangonyx pseudogracilis) (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan, 2012) and 96-hour LC50 = 800 mg Mo/L for fish (Oncorhynchus mykiss) (Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan, 2012), it was classified as "Not classified." |
| 11 | Hazardous to the aquatic environment (Long-term) | Not classified |
- |
- | - | Although the behavior in water is unknown due to a metal compound, from 7-day NOEC (growth rate) = 24.7 mg Mo/L for monocotyledonous plant (Lemna minor), 21-day NOEC (reproduction) = 50 mg Mo/L for crustacea (Daphnia magna), 1-year NOEC (lethal, growth) >= 17.0 mg Mo/L for fish (Oncorhynchus mykiss) (all Result of the initial environmental risk assessment of chemicals, Vol. 10, Ministry of the Environment in Japan, 2012), it was classified as "Not classified." |
| 12 | Hazardous to the ozone layer | Classification not possible |
- |
- | - | No data. |
NOTE:
| * A blank or "-" in a cell of classification denotes that the classification of the hazard class was not conducted. * Hazard_statement_and/or_Precautionary_statement will show when hovering the mouse over a code of Hazard_statement_and/or_Precautionary_statement. Hazard_statement_and/or_Precautionary_statement are also provided in the Excel file. * Classification was conducted by relevant Japanese Ministries in accordance with GHS Classification Guidance for the Japanese Government, and is intended to provide a reference for preparing GHS labelling and SDS for users. * This is a provisional English translation of classification results and is subject to revision without notice. * The responsibility for any resulting GHS labelling and SDS referenced from this site is with users. * Codes assigned to each of the hazard statements and codes for each of the precautionary statement are based on the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) in United Nations. |